Question

我有一个 SPRING 应用程序。我跑的时候

mvn jetty:run

一切都好。

我想在我的项目中使用 JMX 。

我创建了另一个项目，我为初学者尝试了教程，我能够看到 jconsole 的一些变化。

现在，我想在我的真实项目中使用JMX，我想使用管理JMX的SPRING库 - 关注这篇文章

How to integrate JMX with Spring?

我上课了：

public class MyMainClass {
  private int var1;
  private int var2;
  private TimeUnit var3;

  // public getters and setters
  public static MyXXXClass<String, Object> getInstance();
}

并在 config.xml

中

<!-- other beans -->
<bean id="myid" class="com.my.package.MyMainClass">
    <property name="var1" value.../>
    <property name="var2" value... />
    <property name="var3" value.../>
</bean>
<!-- other beans -->

我改变了一些东西，使它适用于JMX。

我添加了一个界面：

import java.util.concurrent.TimeUnit;

public interface IMyMainClassBean {

    public int getVar1();

    public void setVar1(int var1);

    public int getVar2();

    public void setVar2(int var2);

    public TimeUnit getVar3();

    public void setVar3(TimeUnit var3);
}

我在课程中添加了 implements ：

public class MyMainClassBean implements IMyMainClassBean {...}

最后，我编辑了我的xml文件：

<!-- other beans -->
<bean id="myid" class="com.my.package.MyMainClassBean">
    <property name="var1" value.../>
    <property name="var2" value... />
    <property name="var3" value.../>
</bean>

<!-- this bean must not be lazily initialized if the exporting is to happen -->
<bean id="exporter" class="org.springframework.jmx.export.MBeanExporter"
    lazy-init="false">
    <property name="beans">
        <map>
            <entry key="bean:name=testBean1" value-ref="myid" />
        </map>
    </property>
</bean>
<!-- other beans -->

现在，当我启动我的服务器时，它给了我很多例外（日志很长，所以我只复制了一个我认为最重要的部分）。

Caused by: org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [com.my.package
.MyMainClassBean@3d4395fb] with key 'bean:name=testBean1'; nested exception is javax.management.InstanceAlreadyExistsExcep
tion: bean:name=testBean1
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:602)
        at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:527)
        at org.springframework.jmx.export.MBeanExporter.afterPropertiesSet(MBeanExporter.java:413)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableB
eanFactory.java:1571)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBean
Factory.java:1509)
        ... 163 more
Caused by: javax.management.InstanceAlreadyExistsException: bean:name=testBean1
        at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:453)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1484)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:963)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:917)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:312)
        at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:483)
        at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:195)
        at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:655)
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:592)
        ... 167 more
[WARNING] Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myTask' defined
 in class path resource [anotherconfigfile.xml]: Cannot resolve reference to bean 'anotherimport' while setting bean property 'targetObj
ect'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'anotherimport' defin
ed in class path resource [anotherconfigfile.xml]: Cannot create inner bean 'myTotallyAnotherClass' of type [com.my.package.another.MyTotallyAnotherClass]
 while setting bean property 'myTotallyAnotherClass'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creatin
g bean with name 'myTotallyAnotherClass' defined in class path resource [anotherconfigfile.xml]: Instantiation of bean failed; nested exception is
 org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.my.package.another.MyTotallyAnotherClass]: Co
nstructor threw exception; nested exception is java.lang.ExceptionInInitializerError:
javax.management.InstanceAlreadyExistsException: bean:name=testBean1
        at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:453)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1484)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:963)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:917)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:312)
        at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:483)
        at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:195)
        at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:655)
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:592)
        at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:527)
        at org.springframework.jmx.export.MBeanExporter.afterPropertiesSet(MBeanExporter.java:413)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableB
eanFactory.java:1571)

我甚至不知道如何调试它。

感谢您的所有提示。

Answer 1

引起：javax.management.InstanceAlreadyExistsException：bean：name = testBean1

这是试图告诉您，您有2个名为ObjectName的{{1}}的bean正在注册bean:name=testBean1。但是，除非您的MBeanExporter地图中有其他XML文件或更多条目，否则不应该有。

我甚至不知道如何调试它。

您可以在beans方法中放置一个断点，以查看正在注册的bean，看看您是否可以找出重复的原因。

另外，我的SimpleJMX library是通过JMX导出bean的简单方法。还有很好的Spring支持。以下是有关using with Spring的文档。还有一个Spring test program，演示了如何使其正常工作。这是Spring XML file。

Answer 2

这种情况正在发生，因为即使在初始化一次之后bean也在尝试初始化。

我在Spring TestNG测试用例中面临与RabbitMQ配置相同的问题。

使用@DirtiesContext作为每个测试用例类的类级别注释。

这将创建applicationcontext并在运行testcase类后终止它，并为下一个测试用例类创建一个新的applicationcontext。

示例 -

@Test
@ContextConfiguration(classes = { ApplicationConfig.class })
@DirtiesContext
@WebAppConfiguration
public class ATest extends AbstractTestNGSpringContextTests{
    @BeforeSuite
    public void setup() throws Throwable {

    }
    @AfterSuite
    public void teardown() {

    }
}

无法将JMX与Spring应用程序集成

2 个答案: